EDSON RIVETOLOGY

The Practical Guide to Choosing a Rivet

Sixty years of toolmaking, distilled. Anatomy, terminology, and the four essentials you need before you pick a rivet for the job.

Anatomy of a Blind Rivet

Blind rivet anatomy
Rivet Body
Also called the “eyelet.” The shell that fills the hole and holds the joint.
Rivet Flange
Also called the “rivet head.” Available in domed, large flange, or countersunk.
Mandrel
Also called the “nail.” The wire that pulls through to set the rivet.
Mandrel Head
The shaped end that deforms the body and creates the blind-side bulge.
Mandrel Point
The end that loads into the nose piece of the tool. Can be chiseled or pointed.

Stamped vs. Extruded

Extruded blind rivet

Stamped or extruded refers to how the body is formed.

Extruded tends to have higher shear and tensile strength due to thicker walls — making it more rigid in the application.

Stamped is often called “soft set.” Less prone to damaging fragile applications.

Edson’s edge: we make stainless rivets with a stamped body, allowing an easier upset that customers prefer.

What Is Grip Range?

Grip range is the total thickness of the material being held together by the rivet.

The correct rivet size is selected by its grip range minimum and maximum specification — this is key to a successful installation.

Grip range diagram
SHEAR STRENGTH

A material’s or component’s ability to resist forces that can cause a sliding failure of the material.

TENSILE STRENGTH

The maximum stress a material can withstand while being stretched or pulled apart before breaking.

THE STANDARD

IFI Section 114

The Industrial Fastener Institute (IFI) Section 114 indicates the standard dimensional, mechanical, and performance requirements of break-mandrel blind rivets.

Edson’s very own Bill Conley discovered and corrected an error within the IFI standard while conducting shear & tensile testing on stainless.

HOW TO CHOOSE

Four Blind Rivet Essentials

What every engineer should consider before specifying a rivet.

1
Grip Range
Incorrect grip may result in the rivet pulling through, not upsetting correctly, or not retaining the mandrel head.
2
Hole Size
Too large could result in the mandrel breaking off above the flange.
3
Material
Match rivet material to substrate — consider corrosion resistance and galvanic compatibility.
4
Rivet Style
Domed, large flange, countersunk, closed end, multigrip, structural — the right style for the application.
ALSO CONSIDER
Shear & tensile strength  ·  Corrosion resistance  ·  Installation tool
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